dcrat | 858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-11-2024 21:33

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General

Target

lfcdgbuksf.exe
Size

1.6MB
MD5

8c6e4c86c216b898f24ff14b417c4369
SHA1

266e7d01ba11cd7914451c798199596f4d2f7b53
SHA256

858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f
SHA512

3f6416bf0b7989b522d399e151cc755783b9b7afe9cde559f8207fad6c043e24f85b22c3a583329e1620e862c7824249c536209b6be5e093a2b580c2fc52f660
SSDEEP

24576:o2a0H/WPj+rsO6AOhaDxL/aySUYj79FcPX6t1:va0SKsOP1L/KzEP

Score

10^/10

dcrat infostealer rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

DCRat payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2684-1-0x0000000000820000-0x00000000009BC000-memory.dmp	family_dcrat_v2
behavioral1/files/0x000e000000012117-32.dat	family_dcrat_v2
behavioral1/memory/2476-34-0x0000000000280000-0x000000000041C000-memory.dmp	family_dcrat_v2

Executes dropped EXE 1 IoCs

pid	Process
2476	staticfile.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe
2684	lfcdgbuksf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2684	lfcdgbuksf.exe
Token: SeDebugPrivilege	2476	staticfile.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2476	staticfile.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2208	2684	lfcdgbuksf.exe	30
PID 2684 wrote to memory of 2208	2684	lfcdgbuksf.exe	30
PID 2684 wrote to memory of 2208	2684	lfcdgbuksf.exe	30
PID 2208 wrote to memory of 2492	2208	cmd.exe	32
PID 2208 wrote to memory of 2492	2208	cmd.exe	32
PID 2208 wrote to memory of 2492	2208	cmd.exe	32
PID 2208 wrote to memory of 2980	2208	cmd.exe	33
PID 2208 wrote to memory of 2980	2208	cmd.exe	33
PID 2208 wrote to memory of 2980	2208	cmd.exe	33
PID 2208 wrote to memory of 2476	2208	cmd.exe	35
PID 2208 wrote to memory of 2476	2208	cmd.exe	35
PID 2208 wrote to memory of 2476	2208	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\lfcdgbuksf.exe
"C:\Users\Admin\AppData\Local\Temp\lfcdgbuksf.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\17KUxeyvo4.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2208
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2492
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2980
- - C:\Users\Admin\AppData\Local\staticfile.exe
    "C:\Users\Admin\AppData\Local\staticfile.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2476

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\17KUxeyvo4.bat

Filesize
219B

MD5
597adc9bf942ba54f16e777c0e3f5a93

SHA1
7ca071798980b49fbb1930594346941574d37db1

SHA256
2297396cf6b0f7b742772c46bdd074f6bf4abdef593ab815afe800c6a2a46ddc

SHA512
ba49bd3cbb1991152b4a400516e8ff71a1919eb32dc04dc71df936d45fdb7143b530584a8ab2adf79b74f8553915e6245692de0bfa88fcd7eb4799dfc7939375

Download Submit
C:\Users\Admin\AppData\Local\staticfile.exe

Filesize
1.6MB

MD5
8c6e4c86c216b898f24ff14b417c4369

SHA1
266e7d01ba11cd7914451c798199596f4d2f7b53

SHA256
858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

SHA512
3f6416bf0b7989b522d399e151cc755783b9b7afe9cde559f8207fad6c043e24f85b22c3a583329e1620e862c7824249c536209b6be5e093a2b580c2fc52f660

Download Submit
memory/2476-34-0x0000000000280000-0x000000000041C000-memory.dmp

Filesize
1.6MB

Download
memory/2684-15-0x000000001AC00000-0x000000001AC5A000-memory.dmp

Filesize
360KB

Download
memory/2684-19-0x000000001A7D0000-0x000000001A81E000-memory.dmp

Filesize
312KB

Download
memory/2684-7-0x00000000007E0000-0x00000000007F8000-memory.dmp

Filesize
96KB

Download
memory/2684-9-0x0000000000800000-0x0000000000816000-memory.dmp

Filesize
88KB

Download
memory/2684-10-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-12-0x0000000000B50000-0x0000000000B62000-memory.dmp

Filesize
72KB

Download
memory/2684-13-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-0-0x000007FEF5CD3000-0x000007FEF5CD4000-memory.dmp

Filesize
4KB

Download
memory/2684-17-0x0000000000320000-0x000000000032E000-memory.dmp

Filesize
56KB

Download
memory/2684-5-0x0000000000300000-0x000000000031C000-memory.dmp

Filesize
112KB

Download
memory/2684-22-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-26-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-28-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-27-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-30-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-4-0x0000000000320000-0x000000000033C000-memory.dmp

Filesize
112KB

Download
memory/2684-2-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2684-1-0x0000000000820000-0x00000000009BC000-memory.dmp

Filesize
1.6MB

Download